Snap fastener device



SNAP FASTENER DEVICE Filed March 5l, 1934 I @ver/ian- Newman 09.121322, Si f mig.

corrugations I I.

Patented Aug. 20, 1935 Mass-assigner to .l Cambridge,vr y

" a corporatonof Massachusetts l Application March `31,

' 5 Claw-,L- (Cif-Zi-.zli

- My invention'aims to {provide improvements in snap fastener devices. f f y In the drawing which illustrates a preferred embodiment of my inventionz- Figure 1 is a plan view of a snap fastener socket attached to a carrying medium and showing the corrugated fiange of the socket;

Fig. 2 is a plan view of the stud installation for engagement with the socket installation showing the cooperating corrugated flange; and y Fig. 3 is an enlarged section taken onl the line 3-3 of Figure 1 with the stud being engaged with the socket and also shown in cross-section.

The particular snap fastener members selected for illustration of my invention are well known to those skilled in the art with the exception of the corrugated flanges of the various parts which flanges provide a new and useful snap fastener structure which I claim to be my invention. Heretofore, the flanges of the type of snap. fastener illustrated have presented smooth surfaces. I have found that by providing the contacting flanges oi the socket and stud with interlocking ribs and grooves the fastener parts are much stronger and are prevented from lateral separation because of the interlocking engagement.

The stud member illustrated in Figs. 2 and 3 is formed from a single piece of sheet metal and Yis provided with a V`base flange to any suitable carrying medium, such, for instance, as a flexible material 5, by means of an attaching memberY provided with a flange 6 having a series of concentrically arranged corrugations 1 and an attaching shank 8. The attaching f shank 8 passes through the carrying medium and has its end upset in the enlarged end Yor head 3 of the fastener stud, as best shown in Fig. 3. 'I'he corrugations formed in the flanges stud and attaching parts, respectively, are preferably so arranged that the carrying medium 5 is interlocked with the corrugations to prevent it from being pulled out from between those flanges when lateral stress is exerted upon the carrying medium. The corrugations, therefore, provide a stronger attachment Yof the parts of the stud installation to the carrying medium.

The cooperating socket member has a flange 9 surrounding a stud-receiving aperture I0 and provided with a series of concentrically arranged The socket is also provided with a tubular shank more or less in the form of a dome I2 and this dome, together with the flange I having a series` of concentrically arranged corrugations 2, a head 3 and a neck 4. This stud member is'attached I and 6'of the 1934, Seriana-.718,373

9,isy divided A'by slits `Lrex'ten'ding from near Athe top of thedome to the uterperipherai age'f the fiange" 9, -asl shown Figure 1. f The'socket is attachedl toa carryiV cap I5 within which the upper fend of the dome medium' I4 by a nouw.'Y

is spread outwardly (Fig. 3) after passing through the carrying medium I4. Y

When the stud and socket are snapped intoengagement with one another, as illustrated by Fig. 3, the ribs of the corrugations II enter the valleys of the corrugations 2 thereby forming a nesting or interlocking relationship, as best illustrated in Fig. 3. This interlocking of the corrugations prevents any substantial lateral movement of the stud member relative to the socket when stresses are exerted laterally upon the carrying mediums' 5 and I4 in opposite-directions thereby helping to keep the stud and scket in .engagement against accidental separation. It will be seenfrom the description and illustration of my invention that it relates primarily to the interlocking engagement ofcontacting flanges and also to the nesting arrangement of flangesv of a fastener installation with an interposed carrying medium that of necessity takes a corrugated form thereby strengthening the installation.

While I have shown my invention in connection with `a'yieldable socket and a rigid stud member, it should be understood that 'my invention may be used with other suitable types of fastener members and therefore my invention is best defined by the following claims.

I claim: Y l. A snap fastener device including a stud member and a cooperating socket member,A said stud member having a base,a head and a neck and said base having a plurality of circular ribs, said socket having a front facensurrounding a stud-receiving aperture, and said front face having a plurality of circular ribs .adapted to engage between the ribs on the stud and socket, are engaged, said cooperating ribs interlocking to prevent socket when under lateral stresses.

2. A snap fastener member and a cooperating socket member, said 'stud member having a base, a head-and a neck, said base having'a plurality of` concentrically arranged circularribs, said socket having a front face surrounding a stud-receiving'aperture, said front facehaving a'plurality of concentricallyV between the ribs base when thestudV separation of the stud and.V

device including a studY when the stud when the stud and socket are engaged for the purposes described.

4. A snap fastener member installation ncluding a snap fastener part, a carrying medium and an attaching part, the snap fastener part having g f a flange portion located at one side ofthe carry-' l ing medium and provided with a plurality of circular corrugations and the attaching member having a flange at the opposite side of the carry-2 ing medium, said flange being provided with a f plurality of` circular., corrugations nesting with the, corrugations of y the flange on the fastener partthereby gripping the carrying medium tightly between the corrugations to prevent the carrying medium from being pulled from between said flanges under normal lateral stresses.

5. A snap fastener member installation including a snap fastener part, a carrying medium and an attaching part, the snap fastener part having a flange portion located at one side of the carrying medium and provided with a plurality of circular corrugations andthe attaching member having a ang'e at the oppositejside -of the carrying medium, said'flange 'lz'xeingprovided with a 10 plurality of circular corrugations nesting with "the corrugations of the flange on the fastener part thereby gripping the carrying medium tightly between the corrugations to prevent the carryv ing medium from' being pulled from between said flanges undernormal lateral stresses and a cooperating snap lfastener member for snap fastening engagement. with the first mentioned snap fastener member and provided with a corrugated flange'which has the corrugations thereof interlocking with thoserof the flange ofthe first mentioned snap fastener part.

1 l NRMA'N YAIDILL. 

